JONES, VERNONIEAE THE GENERA OF VERNONIEAE (COMPOSITAE) IN THE SOUTHEASTERN UNITED STATES' SAMUEL B. JONES, JR.VERNONIEAE Cassini. Jour. Phys. Chim. Hist. Nat. Arts 88: 203. 1819.2 Perennial or annual herbs, [shrubs, rarely trees or vines]. Leaves alternate,rarely opposite or whorled, sessile or petiolate. Heads homogamous, 1-tomany-flowered, sometimes syncephalous, the receptacles flat or subconvex,usually smooth or pitted, rarely hairy, bristly, or chaffy. Flowers usuallyperfect; phyllaries many, in several series, closely or loosely imbricate, orrarely few and not imbricate. Pappus in one or more series, usually setose,the bristles in some genera flattened or rarely reduced or lacking. Corollastubular (subligulate in Stokesia). tube elongate, limb with 5 narrow lobes,rarely (3-or) 4-lobed and slightly bilabiate, deep purplish-red, white, or blue[rarely yellow to orange in some Old World species], frequently glandular.Anthers with or without auriculate basal appendages; pollen grains echinateto lophate. Style branches slender, acute or slightly obtuse, uniformly andshortly hirsute, the stigmatic papillae on the inner surface toward the base(see Solbrig, 1963, fig. 2c). Achenes variable, terete to subterete. 3-to 10-(to 20-)ribbed or 4-or 5-angled. TYPE GENUS: Vernonia Schreber. Gen. 2:541. 1791. A tribe of about 70 genera and 1500 species grouped into two to eight 'Prepared for the Generic Flora of the Southeastern United States, a project of the ArnoldArboretum made possible through the support of the National Science Foundation, cur-rently under Grant DEB-81-11520 (Carroll E. Wood, Jr., and Norton G. Miller, principalinvestigators). This treatment, the 96th in the series, follows the format established in thefirst paper (Jour. Arnold Arb. 39: 296-346. 1958) and continued to the present. The areacovered by the Generic Flora includes North and South Carolina, Georgia. Florida. Ten-nessee. Alabama. Mississippi, Arkansas, and Louisiana. The descriptions are based pri-marily on the plants of this area, with information about extraregional members of a familyor genus in brackets [ ]. I am grateful to Drs. Wood and Miller for their editorial assistance, and to my associatesat the University of Georgia, Nancy C. Coile and Anna Baker. as well as to my past andpresent graduate students who have worked toward developing a better understanding ofthis fascinating tribe. This research was supported by the University of Georgia and byseveral research grants from the National Science Foundation. The illustration of Stokesia was drawn by the late Dorothy H. Marsh from plants sentfrom Mississippi by Dr. R. B. Channell and grown by Dr. Wood for the Generic Flora. 2The tribes of Compositae have been treated previously by O. T. Solbrig (The tribesof Compositae in the Southeastern United States. Jour. Arnold Arb. 44: 436-461. 1963).The reader should consult this work for additional information (e.g., familial and tribaldescriptions, notes, and references) not included here.� President and Fellows of Harvard College. 1982.Journal of the Arnold Arboretum 63: 489-507. October, 1982.489



The genera of Vernonieae (Compositae) in the southeastern United States

S B Jones Jr.
Journal of the Arnold Arboretum 63: 489-507 (1982)

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